Albert, A. Adrian. 1941, November 22. Some Mathematical Aspects of Cryptography. Invited paper, AMS 382nd Meeting, Manhattan, Kansas.
Christensen, Chris. 2007, October. Polish Mathematicians Finding Patterns in Enigma Messages. Mathematics Magazine 80(4): 4.
Hardy, G. H. 1940. A Mathematician’s Apology. Cambridge University Press. Reprinted with annotations and commentary by Alan J. Cain in An Annotated Mathematician's Apology, 1–69. Lisbon, 2019. Ebook, version 0.92.56 (2023-08-07).
Jackson, John. n.d. Bombe History. The National Museum of Computing, Bletchley Park.
Rejewski, Marian. 1980. An Application of the Theory of Permutations in Breaking the Enigma Cipher. Applicaciones Mathematicae 16(4): 5435–5459.
Jeff Suzuki is Professor of Mathematics at Brooklyn College. During the pandemic, he missed a meeting and was elected Department Chair. Prior to that time, he has written on the history of mathematics; the uses of mathematics in constitutional law; and the mathematics behind recent patents. His educational videos on mathematics and other random subjects may be found on his YouTube channel at https://www.youtube.com/jeffsuzuki1. His current work includes devising best practices for giving online exams and coauthoring an inquiry-based approach to abstract algebra.